Nordyne Single Package Heat Pump R-410A Manual Do Utilizador

11

Control Fault (No Power)

Off

Normal Operation

On

ASCD Delay Active
(with compressor demand)

1 Flash

Low Pressure Switch Lockout

2 Flashes

High Pressure Switch Lockout

3 Flashes

Ambient Sensor Fault

4 Flashes

Coil Sensor Fault

5 Flashes

Star Bushing

Bolt

Nut

Ambient Sensor

Plastic Clip

Nut

Control is uncalibrated when power is applied. 
Calibration occurs after a defrost cycle. The 
control initiates defrost after 34 minutes of 
accumulated compressor run time in heating 
with coil temperature below 35° F. The defrost 
cycle terminates when the coil sensor reaches 
termination temperature or after 14 minutes. 
Note: All units are shipped from the factory 
with the default termination temperature set 
at 70° F.

Defrost function is disabled if coil temperature is 
above 35° F. If the ambient sensor is detected as 
open or shorted, demand defrost will not operate 
and control will revert to time/temperature defrost 
operation. If the outdoor coil sensor is detected 
as open or shorted, the control will not perform 
demand or time/temperature defrost operation.
Note: When the defrost cycle initiates, there 
will be a 30 second compressor delay going 
into and out of the defrost cycle. This delay may 
be removed by removing P6 connector on the 
board.

This 2-stage unit will defrost in second stage 
regardless of the stage called for by the 
thermostat.

6.  Install one spacer next between the 

p l a s t i c   c l i p   a n d   m o u n t i n g   b ra cke t .

7.  Bend the mounting bracket into position. 

Install the mounting bracket to the unit 
using the screw in the corner panel.

Electric Heat Package (optional)
This heat pump is shipped without an auxiliary 
electric heat kit installed. If electric heat is desired, 
an accessory Heater Kit must be fi eld installed. 
See Specifi cations Sheet for available kits and 
their application.
•  Select the correct size heat package for the 

installation. 

•  Follow installation instructions provided with 

each heater kit. 

•  Installation is most easily accomplished before 

making duct or electrical connections.

•  Refer to Table 2 (page 10) for blower 

speeds.

Ambient Sensor Mounting
For optimum performance of the heat pump 
system, the ambient sensor (Figure 10) must 
be mounted on the outside of the unit.
1.  Remove the mounting bracket and all 

h a r d w a r e   i n c l u d e d   i n   t h e   p a cke t .

2. 

 

R e m o v e   s t a r   b u s h i n g   f r o m   7 / 8 ” 
h o l e   i n   c o r n e r   p a n e l   o f   t h e   u n i t .

3.  Route the ambient sensor through the 7/8” 

hole in the corner panel of the unit, and then 
through the 7/8” hole in the mounting bracket.

4. 

 

R o u t e   t h e   s e n s o r   t h r o u g h   t h e 
star bushing. Use the star bushing to 
secure the mounting bracket to the unit.

5.  Secure the ambient sensor inside the 

plastic clip and secure it to the mounting 
bracket with the screw and nut provided.